/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Collision/ParticlePairMidPhase.h
Reactivate the constraint  SleepEpoch The tick on which the particle went to sleep. Only constraints that were active when the particle went to sleep should be reactivated.
void WakeCollisionsImpl ( const int32 SleepEpoch, const int32 CurrentEpoch )